drivers/net/wireless/ath/ath6kl/htc.h

   1 /*
   2  * Copyright (c) 2004-2011 Atheros Communications Inc.
   3  * Copyright (c) 2011 Qualcomm Atheros, Inc.
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #ifndef HTC_H
  19 #define HTC_H
  20
  21 #include "common.h"
  22
  23 /* frame header flags */
  24
  25 /* send direction */
  26 #define HTC_FLAGS_NEED_CREDIT_UPDATE (1 << 0)
  27 #define HTC_FLAGS_SEND_BUNDLE        (1 << 1)
  28 #define HTC_FLAGS_TX_FIXUP_NETBUF    (1 << 2)
  29
  30 /* receive direction */
  31 #define HTC_FLG_RX_UNUSED        (1 << 0)
  32 #define HTC_FLG_RX_TRAILER       (1 << 1)
  33 /* Bundle count maske and shift */
  34 #define HTC_FLG_RX_BNDL_CNT      (0xF0)
  35 #define HTC_FLG_RX_BNDL_CNT_S    4
  36
  37 #define HTC_HDR_LENGTH  (sizeof(struct htc_frame_hdr))
  38 #define HTC_MAX_PAYLOAD_LENGTH   (4096 - sizeof(struct htc_frame_hdr))
  39
  40 /* HTC control message IDs */
  41
  42 #define HTC_MSG_READY_ID                1
  43 #define HTC_MSG_CONN_SVC_ID             2
  44 #define HTC_MSG_CONN_SVC_RESP_ID        3
  45 #define HTC_MSG_SETUP_COMPLETE_ID       4
  46 #define HTC_MSG_SETUP_COMPLETE_EX_ID    5
  47
  48 #define HTC_MAX_CTRL_MSG_LEN  256
  49
  50 #define HTC_VERSION_2P0  0x00
  51 #define HTC_VERSION_2P1  0x01
  52
  53 #define HTC_SERVICE_META_DATA_MAX_LENGTH 128
  54
  55 #define HTC_CONN_FLGS_THRESH_LVL_QUAT           0x0
  56 #define HTC_CONN_FLGS_THRESH_LVL_HALF           0x1
  57 #define HTC_CONN_FLGS_THRESH_LVL_THREE_QUAT     0x2
  58 #define HTC_CONN_FLGS_REDUCE_CRED_DRIB          0x4
  59 #define HTC_CONN_FLGS_THRESH_MASK               0x3
  60 /* disable credit flow control on a specific service */
  61 #define HTC_CONN_FLGS_DISABLE_CRED_FLOW_CTRL          (1 << 3)
  62 #define HTC_CONN_FLGS_SET_RECV_ALLOC_SHIFT    8
  63 #define HTC_CONN_FLGS_SET_RECV_ALLOC_MASK     0xFF00U
  64
  65 /* connect response status codes */
  66 #define HTC_SERVICE_SUCCESS      0
  67 #define HTC_SERVICE_NOT_FOUND    1
  68 #define HTC_SERVICE_FAILED       2
  69
  70 /* no resources (i.e. no more endpoints) */
  71 #define HTC_SERVICE_NO_RESOURCES 3
  72
  73 /* specific service is not allowing any more endpoints */
  74 #define HTC_SERVICE_NO_MORE_EP   4
  75
  76 /* report record IDs */
  77 #define HTC_RECORD_NULL             0
  78 #define HTC_RECORD_CREDITS          1
  79 #define HTC_RECORD_LOOKAHEAD        2
  80 #define HTC_RECORD_LOOKAHEAD_BUNDLE 3
  81
  82 #define HTC_SETUP_COMP_FLG_RX_BNDL_EN     (1 << 0)
  83 #define HTC_SETUP_COMP_FLG_DISABLE_TX_CREDIT_FLOW (1 << 1)
  84
  85 #define MAKE_SERVICE_ID(group, index) \
  86         (int)(((int)group << 8) | (int)(index))
  87
  88 /* NOTE: service ID of 0x0000 is reserved and should never be used */
  89 #define HTC_CTRL_RSVD_SVC MAKE_SERVICE_ID(RSVD_SERVICE_GROUP, 1)
  90 #define WMI_CONTROL_SVC   MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 0)
  91 #define WMI_DATA_BE_SVC   MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 1)
  92 #define WMI_DATA_BK_SVC   MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 2)
  93 #define WMI_DATA_VI_SVC   MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 3)
  94 #define WMI_DATA_VO_SVC   MAKE_SERVICE_ID(WMI_SERVICE_GROUP, 4)
  95 #define WMI_MAX_SERVICES  5
  96
  97 #define WMM_NUM_AC  4
  98
  99 /* reserved and used to flush ALL packets */
 100 #define HTC_TX_PACKET_TAG_ALL          0
 101 #define HTC_SERVICE_TX_PACKET_TAG      1
 102 #define HTC_TX_PACKET_TAG_USER_DEFINED (HTC_SERVICE_TX_PACKET_TAG + 9)
 103
 104 /* more packets on this endpoint are being fetched */
 105 #define HTC_RX_FLAGS_INDICATE_MORE_PKTS  (1 << 0)
 106
 107 /* TODO.. for BMI */
 108 #define ENDPOINT1 0
 109 /* TODO -remove me, but we have to fix BMI first */
 110 #define HTC_MAILBOX_NUM_MAX    4
 111
 112 /* enable send bundle padding for this endpoint */
 113 #define HTC_FLGS_TX_BNDL_PAD_EN  (1 << 0)
 114 #define HTC_EP_ACTIVE                            ((u32) (1u << 31))
 115
 116 /* HTC operational parameters */
 117 #define HTC_TARGET_RESPONSE_TIMEOUT        2000 /* in ms */
 118 #define HTC_TARGET_RESPONSE_POLL_WAIT      10
 119 #define HTC_TARGET_RESPONSE_POLL_COUNT     200
 120 #define HTC_TARGET_DEBUG_INTR_MASK         0x01
 121 #define HTC_TARGET_CREDIT_INTR_MASK        0xF0
 122
 123 #define HTC_HOST_MAX_MSG_PER_BUNDLE        8
 124 #define HTC_MIN_HTC_MSGS_TO_BUNDLE         2
 125
 126 /* packet flags */
 127
 128 #define HTC_RX_PKT_IGNORE_LOOKAHEAD      (1 << 0)
 129 #define HTC_RX_PKT_REFRESH_HDR           (1 << 1)
 130 #define HTC_RX_PKT_PART_OF_BUNDLE        (1 << 2)
 131 #define HTC_RX_PKT_NO_RECYCLE            (1 << 3)
 132
 133 #define NUM_CONTROL_BUFFERS     8
 134 #define NUM_CONTROL_TX_BUFFERS  2
 135 #define NUM_CONTROL_RX_BUFFERS  (NUM_CONTROL_BUFFERS - NUM_CONTROL_TX_BUFFERS)
 136
 137 #define HTC_RECV_WAIT_BUFFERS        (1 << 0)
 138 #define HTC_OP_STATE_STOPPING        (1 << 0)
 139 #define HTC_OP_STATE_SETUP_COMPLETE  (1 << 1)
 140
 141 /*
 142  * The frame header length and message formats defined herein were selected
 143  * to accommodate optimal alignment for target processing. This reduces
 144  * code size and improves performance. Any changes to the header length may
 145  * alter the alignment and cause exceptions on the target. When adding to
 146  * the messagestructures insure that fields are properly aligned.
 147  */
 148
 149 /* HTC frame header
 150  *
 151  * NOTE: do not remove or re-arrange the fields, these are minimally
 152  * required to take advantage of 4-byte lookaheads in some hardware
 153  * implementations.
 154  */
 155 struct htc_frame_hdr {
 156         u8 eid;
 157         u8 flags;
 158
 159         /* length of data (including trailer) that follows the header */
 160         __le16 payld_len;
 161
 162         /* end of 4-byte lookahead */
 163
 164         u8 ctrl[2];
 165 } __packed;
 166
 167 /* HTC ready message */
 168 struct htc_ready_msg {
 169         __le16 msg_id;
 170         __le16 cred_cnt;
 171         __le16 cred_sz;
 172         u8 max_ep;
 173         u8 pad;
 174 } __packed;
 175
 176 /* extended HTC ready message */
 177 struct htc_ready_ext_msg {
 178         struct htc_ready_msg ver2_0_info;
 179         u8 htc_ver;
 180         u8 msg_per_htc_bndl;
 181 } __packed;
 182
 183 /* connect service */
 184 struct htc_conn_service_msg {
 185         __le16 msg_id;
 186         __le16 svc_id;
 187         __le16 conn_flags;
 188         u8 svc_meta_len;
 189         u8 pad;
 190 } __packed;
 191
 192 /* connect response */
 193 struct htc_conn_service_resp {
 194         __le16 msg_id;
 195         __le16 svc_id;
 196         u8 status;
 197         u8 eid;
 198         __le16 max_msg_sz;
 199         u8 svc_meta_len;
 200         u8 pad;
 201 } __packed;
 202
 203 struct htc_setup_comp_msg {
 204         __le16 msg_id;
 205 } __packed;
 206
 207 /* extended setup completion message */
 208 struct htc_setup_comp_ext_msg {
 209         __le16 msg_id;
 210         __le32 flags;
 211         u8 msg_per_rxbndl;
 212         u8 Rsvd[3];
 213 } __packed;
 214
 215 struct htc_record_hdr {
 216         u8 rec_id;
 217         u8 len;
 218 } __packed;
 219
 220 struct htc_credit_report {
 221         u8 eid;
 222         u8 credits;
 223 } __packed;
 224
 225 /*
 226  * NOTE: The lk_ahd array is guarded by a pre_valid
 227  * and Post Valid guard bytes. The pre_valid bytes must
 228  * equal the inverse of the post_valid byte.
 229  */
 230 struct htc_lookahead_report {
 231         u8 pre_valid;
 232         u8 lk_ahd[4];
 233         u8 post_valid;
 234 } __packed;
 235
 236 struct htc_bundle_lkahd_rpt {
 237         u8 lk_ahd[4];
 238 } __packed;
 239
 240 /* Current service IDs */
 241
 242 enum htc_service_grp_ids {
 243         RSVD_SERVICE_GROUP = 0,
 244         WMI_SERVICE_GROUP = 1,
 245
 246         HTC_TEST_GROUP = 254,
 247         HTC_SERVICE_GROUP_LAST = 255
 248 };
 249
 250 /* ------ endpoint IDS ------ */
 251
 252 enum htc_endpoint_id {
 253         ENDPOINT_UNUSED = -1,
 254         ENDPOINT_0 = 0,
 255         ENDPOINT_1 = 1,
 256         ENDPOINT_2 = 2,
 257         ENDPOINT_3,
 258         ENDPOINT_4,
 259         ENDPOINT_5,
 260         ENDPOINT_6,
 261         ENDPOINT_7,
 262         ENDPOINT_8,
 263         ENDPOINT_MAX,
 264 };
 265
 266 struct htc_tx_packet_info {
 267         u16 tag;
 268         int cred_used;
 269         u8 flags;
 270         int seqno;
 271 };
 272
 273 struct htc_rx_packet_info {
 274         u32 exp_hdr;
 275         u32 rx_flags;
 276         u32 indicat_flags;
 277 };
 278
 279 struct htc_target;
 280
 281 /* wrapper around endpoint-specific packets */
 282 struct htc_packet {
 283         struct list_head list;
 284
 285         /* caller's per packet specific context */
 286         void *pkt_cntxt;
 287
 288         /*
 289          * the true buffer start , the caller can store the real
 290          * buffer start here.  In receive callbacks, the HTC layer
 291          * sets buf to the start of the payload past the header.
 292          * This field allows the caller to reset buf when it recycles
 293          * receive packets back to HTC.
 294          */
 295         u8 *buf_start;
 296
 297         /*
 298          * Pointer to the start of the buffer. In the transmit
 299          * direction this points to the start of the payload. In the
 300          * receive direction, however, the buffer when queued up
 301          * points to the start of the HTC header but when returned
 302          * to the caller points to the start of the payload
 303          */
 304         u8 *buf;
 305         u32 buf_len;
 306
 307         /* actual length of payload */
 308         u32 act_len;
 309
 310         /* endpoint that this packet was sent/recv'd from */
 311         enum htc_endpoint_id endpoint;
 312
 313         /* completion status */
 314
 315         int status;
 316         union {
 317                 struct htc_tx_packet_info tx;
 318                 struct htc_rx_packet_info rx;
 319         } info;
 320
 321         void (*completion) (struct htc_target *, struct htc_packet *);
 322         struct htc_target *context;
 323
 324         /*
 325          * optimization for network-oriented data, the HTC packet
 326          * can pass the network buffer corresponding to the HTC packet
 327          * lower layers may optimized the transfer knowing this is
 328          * a network buffer
 329          */
 330         struct sk_buff *skb;
 331 };
 332
 333 enum htc_send_full_action {
 334         HTC_SEND_FULL_KEEP = 0,
 335         HTC_SEND_FULL_DROP = 1,
 336 };
 337
 338 struct htc_ep_callbacks {
 339         void (*tx_complete) (struct htc_target *, struct htc_packet *);
 340         void (*rx) (struct htc_target *, struct htc_packet *);
 341         void (*rx_refill) (struct htc_target *, enum htc_endpoint_id endpoint);
 342         enum htc_send_full_action (*tx_full) (struct htc_target *,
 343                                               struct htc_packet *);
 344         struct htc_packet *(*rx_allocthresh) (struct htc_target *,
 345                                               enum htc_endpoint_id, int);
 346         void (*tx_comp_multi) (struct htc_target *, struct list_head *);
 347         int rx_alloc_thresh;
 348         int rx_refill_thresh;
 349 };
 350
 351 /* service connection information */
 352 struct htc_service_connect_req {
 353         u16 svc_id;
 354         u16 conn_flags;
 355         struct htc_ep_callbacks ep_cb;
 356         int max_txq_depth;
 357         u32 flags;
 358         unsigned int max_rxmsg_sz;
 359 };
 360
 361 /* service connection response information */
 362 struct htc_service_connect_resp {
 363         u8 buf_len;
 364         u8 act_len;
 365         enum htc_endpoint_id endpoint;
 366         unsigned int len_max;
 367         u8 resp_code;
 368 };
 369
 370 /* endpoint distributionstructure */
 371 struct htc_endpoint_credit_dist {
 372         struct list_head list;
 373
 374         /* Service ID (set by HTC) */
 375         u16 svc_id;
 376
 377         /* endpoint for this distributionstruct (set by HTC) */
 378         enum htc_endpoint_id endpoint;
 379
 380         u32 dist_flags;
 381
 382         /*
 383          * credits for normal operation, anything above this
 384          * indicates the endpoint is over-subscribed.
 385          */
 386         int cred_norm;
 387
 388         /* floor for credit distribution */
 389         int cred_min;
 390
 391         int cred_assngd;
 392
 393         /* current credits available */
 394         int credits;
 395
 396         /*
 397          * pending credits to distribute on this endpoint, this
 398          * is set by HTC when credit reports arrive.  The credit
 399          * distribution functions sets this to zero when it distributes
 400          * the credits.
 401          */
 402         int cred_to_dist;
 403
 404         /*
 405          * the number of credits that the current pending TX packet needs
 406          * to transmit. This is set by HTC when endpoint needs credits in
 407          * order to transmit.
 408          */
 409         int seek_cred;
 410
 411         /* size in bytes of each credit */
 412         int cred_sz;
 413
 414         /* credits required for a maximum sized messages */
 415         int cred_per_msg;
 416
 417         /* reserved for HTC use */
 418         struct htc_endpoint *htc_ep;
 419
 420         /*
 421          * current depth of TX queue , i.e. messages waiting for credits
 422          * This field is valid only when HTC_CREDIT_DIST_ACTIVITY_CHANGE
 423          * or HTC_CREDIT_DIST_SEND_COMPLETE is indicated on an endpoint
 424          * that has non-zero credits to recover.
 425          */
 426         int txq_depth;
 427 };
 428
 429 /*
 430  * credit distibution code that is passed into the distrbution function,
 431  * there are mandatory and optional codes that must be handled
 432  */
 433 enum htc_credit_dist_reason {
 434         HTC_CREDIT_DIST_SEND_COMPLETE = 0,
 435         HTC_CREDIT_DIST_ACTIVITY_CHANGE = 1,
 436         HTC_CREDIT_DIST_SEEK_CREDITS,
 437 };
 438
 439 struct ath6kl_htc_credit_info {
 440         int total_avail_credits;
 441         int cur_free_credits;
 442
 443         /* list of lowest priority endpoints */
 444         struct list_head lowestpri_ep_dist;
 445 };
 446
 447 /* endpoint statistics */
 448 struct htc_endpoint_stats {
 449         /*
 450          * number of times the host set the credit-low flag in a send
 451          * message on this endpoint
 452          */
 453         u32 cred_low_indicate;
 454
 455         u32 tx_issued;
 456         u32 tx_pkt_bundled;
 457         u32 tx_bundles;
 458         u32 tx_dropped;
 459
 460         /* running count of total credit reports received for this endpoint */
 461         u32 tx_cred_rpt;
 462
 463         /* credit reports received from this endpoint's RX packets */
 464         u32 cred_rpt_from_rx;
 465
 466         /* credit reports received from RX packets of other endpoints */
 467         u32 cred_rpt_from_other;
 468
 469         /* credit reports received from endpoint 0 RX packets */
 470         u32 cred_rpt_ep0;
 471
 472         /* count of credits received via Rx packets on this endpoint */
 473         u32 cred_from_rx;
 474
 475         /* count of credits received via another endpoint */
 476         u32 cred_from_other;
 477
 478         /* count of credits received via another endpoint */
 479         u32 cred_from_ep0;
 480
 481         /* count of consummed credits */
 482         u32 cred_cosumd;
 483
 484         /* count of credits returned */
 485         u32 cred_retnd;
 486
 487         u32 rx_pkts;
 488
 489         /* count of lookahead records found in Rx msg */
 490         u32 rx_lkahds;
 491
 492         /* count of recv packets received in a bundle */
 493         u32 rx_bundl;
 494
 495         /* count of number of bundled lookaheads */
 496         u32 rx_bundle_lkahd;
 497
 498         /* count of the number of bundle indications from the HTC header */
 499         u32 rx_bundle_from_hdr;
 500
 501         /* the number of times the recv allocation threshold was hit */
 502         u32 rx_alloc_thresh_hit;
 503
 504         /* total number of bytes */
 505         u32 rxalloc_thresh_byte;
 506 };
 507
 508 struct htc_endpoint {
 509         enum htc_endpoint_id eid;
 510         u16 svc_id;
 511         struct list_head txq;
 512         struct list_head rx_bufq;
 513         struct htc_endpoint_credit_dist cred_dist;
 514         struct htc_ep_callbacks ep_cb;
 515         int max_txq_depth;
 516         int len_max;
 517         int tx_proc_cnt;
 518         int rx_proc_cnt;
 519         struct htc_target *target;
 520         u8 seqno;
 521         u32 conn_flags;
 522         struct htc_endpoint_stats ep_st;
 523         u16 tx_drop_packet_threshold;
 524
 525         struct {
 526                 u8 pipeid_ul;
 527                 u8 pipeid_dl;
 528                 struct list_head tx_lookup_queue;
 529                 bool tx_credit_flow_enabled;
 530         } pipe;
 531 };
 532
 533 struct htc_control_buffer {
 534         struct htc_packet packet;
 535         u8 *buf;
 536 };
 537
 538 struct htc_pipe_txcredit_alloc {
 539         u16 service_id;
 540         u8 credit_alloc;
 541 };
 542
 543 enum htc_send_queue_result {
 544         HTC_SEND_QUEUE_OK = 0,  /* packet was queued */
 545         HTC_SEND_QUEUE_DROP = 1,        /* this packet should be dropped */
 546 };
 547
 548 struct ath6kl_htc_ops {
 549         void* (*create)(struct ath6kl *ar);
 550         int (*wait_target)(struct htc_target *target);
 551         int (*start)(struct htc_target *target);
 552         int (*conn_service)(struct htc_target *target,
 553                             struct htc_service_connect_req *req,
 554                             struct htc_service_connect_resp *resp);
 555         int  (*tx)(struct htc_target *target, struct htc_packet *packet);
 556         void (*stop)(struct htc_target *target);
 557         void (*cleanup)(struct htc_target *target);
 558         void (*flush_txep)(struct htc_target *target,
 559                            enum htc_endpoint_id endpoint, u16 tag);
 560         void (*flush_rx_buf)(struct htc_target *target);
 561         void (*activity_changed)(struct htc_target *target,
 562                                  enum htc_endpoint_id endpoint,
 563                                  bool active);
 564         int (*get_rxbuf_num)(struct htc_target *target,
 565                              enum htc_endpoint_id endpoint);
 566         int (*add_rxbuf_multiple)(struct htc_target *target,
 567                                   struct list_head *pktq);
 568         int (*credit_setup)(struct htc_target *target,
 569                             struct ath6kl_htc_credit_info *cred_info);
 570         int (*tx_complete)(struct ath6kl *ar, struct sk_buff *skb);
 571         int (*rx_complete)(struct ath6kl *ar, struct sk_buff *skb, u8 pipe);
 572 };
 573
 574 struct ath6kl_device;
 575
 576 /* our HTC target state */
 577 struct htc_target {
 578         struct htc_endpoint endpoint[ENDPOINT_MAX];
 579
 580         /* contains struct htc_endpoint_credit_dist */
 581         struct list_head cred_dist_list;
 582
 583         struct list_head free_ctrl_txbuf;
 584         struct list_head free_ctrl_rxbuf;
 585         struct ath6kl_htc_credit_info *credit_info;
 586         int tgt_creds;
 587         unsigned int tgt_cred_sz;
 588
 589         /* protects free_ctrl_txbuf and free_ctrl_rxbuf */
 590         spinlock_t htc_lock;
 591
 592         /* FIXME: does this protext rx_bufq and endpoint structures or what? */
 593         spinlock_t rx_lock;
 594
 595         /* protects endpoint->txq */
 596         spinlock_t tx_lock;
 597
 598         struct ath6kl_device *dev;
 599         u32 htc_flags;
 600         u32 rx_st_flags;
 601         enum htc_endpoint_id ep_waiting;
 602         u8 htc_tgt_ver;
 603
 604         /* max messages per bundle for HTC */
 605         int msg_per_bndl_max;
 606
 607         u32 tx_bndl_mask;
 608         int rx_bndl_enable;
 609         int max_rx_bndl_sz;
 610         int max_tx_bndl_sz;
 611
 612         u32 block_sz;
 613         u32 block_mask;
 614
 615         int max_scat_entries;
 616         int max_xfer_szper_scatreq;
 617
 618         int chk_irq_status_cnt;
 619
 620         /* counts the number of Tx without bundling continously per AC */
 621         u32 ac_tx_count[WMM_NUM_AC];
 622
 623         struct {
 624                 struct htc_packet *htc_packet_pool;
 625                 u8 ctrl_response_buf[HTC_MAX_CTRL_MSG_LEN];
 626                 int ctrl_response_len;
 627                 bool ctrl_response_valid;
 628                 struct htc_pipe_txcredit_alloc txcredit_alloc[ENDPOINT_MAX];
 629         } pipe;
 630 };
 631
 632 int ath6kl_htc_rxmsg_pending_handler(struct htc_target *target,
 633                                      u32 msg_look_ahead, int *n_pkts);
 634
 635 static inline void set_htc_pkt_info(struct htc_packet *packet, void *context,
 636                                     u8 *buf, unsigned int len,
 637                                     enum htc_endpoint_id eid, u16 tag)
 638 {
 639         packet->pkt_cntxt = context;
 640         packet->buf = buf;
 641         packet->act_len = len;
 642         packet->endpoint = eid;
 643         packet->info.tx.tag = tag;
 644 }
 645
 646 static inline void htc_rxpkt_reset(struct htc_packet *packet)
 647 {
 648         packet->buf = packet->buf_start;
 649         packet->act_len = 0;
 650 }
 651
 652 static inline void set_htc_rxpkt_info(struct htc_packet *packet, void *context,
 653                                       u8 *buf, unsigned long len,
 654                                       enum htc_endpoint_id eid)
 655 {
 656         packet->pkt_cntxt = context;
 657         packet->buf = buf;
 658         packet->buf_start = buf;
 659         packet->buf_len = len;
 660         packet->endpoint = eid;
 661 }
 662
 663 static inline int get_queue_depth(struct list_head *queue)
 664 {
 665         struct list_head *tmp_list;
 666         int depth = 0;
 667
 668         list_for_each(tmp_list, queue)
 669             depth++;
 670
 671         return depth;
 672 }
 673
 674 void ath6kl_htc_pipe_attach(struct ath6kl *ar);
 675 void ath6kl_htc_mbox_attach(struct ath6kl *ar);
 676
 677 #endif